Re: I can't pull out the lens and twist off, It seems stuck. I can't pull the lens.

I just tried this with a GoPro Hero 6 Black and I did experience some difficulty, it's very hard to remove the lens cover (and for a very good reason, it's there to protect the lens and keep the camera water tight). I found that I had to dig my nails in slightly under each side to make to move the lens cover our a small bit (to make the tiniest of gaps) before the lens cover would rotate and remove.

Re: I can't pull out the lens and twist off, It seems stuck. I can't pull the lens.

Thanks for responding guys. I was finally able to pull and twist it off. Yes it seemed to be stuck but I'm OK now. It just seemed stuck. I had to use a lot of force to take it off. Anyway, thanks for your feedback!